Drill chuck



Dec. 25, 1934. A. M'ISTONE I 1,985,586

DRILL CHUCK Filed Ma a, 1935 Patented Dec. 25, 1934 1,985,586

UNITED STATES PATENT, OFFICE I Arthur'M. Stoner, West Hartford, Conn., assignor to TheJacobs Manufacturing Company, Hartford, Conn., a corporation of Connecticut LApplication my 31, 1933, Serial No. 673,615

3 Claims. (Cl. 27960) I My invention relates to the class of devices Wall ofaclamping sleeve 22 which isscrew threadwhich are employed for holding drills, reamers ed at its larger endto fit the screw threaded end and similar tools for boring, tapping, and anal- 23 of the body 10. ogous operations and an object of my invention, The sleeve 22 has gear teeth 24 formed on its among others, is the production of a device of larger end extending around the periphery there- 5 this type which shall be simple in construction of, these teeth being formed to receive the teeth and particularly efficient in operation. of aso-called key which is in the form of a small ,One form of a chuck'embodying my invention beveled pinion the teeth of which mesh with the and in the construction and use of which the obte th 24 a d a tud 0 the d Of'the y fitting jects herein set out, as well as others, may be ata o Within Which the y is u Such a 10 tained, is illustrated in the accompanying drawy is Shown in 10 0f the drawinging in which- In many types of chucks now in common use Figure 1 is a side view of my improved eh k the hole for the reception of the key has been Figure 2 is a view looking at one end f th formed in the chuck body and the clamping sleeve chuck. has been rotatable upon the body but not mov- 15 Figure 3 is a view looking at the opposite end able lengthwise thereof, the inner surface of the of the chuck. Y sleeve being threaded to engage threaded surfaces Figure 4 is a view in central longitudinal sec- 0 t Chuck j s to v them in d u in tion with parts broken away to show construcmanner that Will be readily understood by these tion. skilled in the art. 20

Figure 5 is an end view of the carrier with the In y improved Chuck I have p y d an Old jaw springs therein, and on a plane denoted by form of Chuck jaws 20 Which, to be Operated,

the dotted line 5-5 of Figure 4 quire a longitudinal movement of the clamp- Figure 6 is a side iew of my improved ehuck ing sleeve 22 on the chuck body, and it is thereshowing a little different form of construction. fore necessary to Provide means for keeping the 25 Figure 7 is an end vie of the same, teeth of the key sufiiciently engaged with the Figure 8 is aview incentral longitudinal section teeth 24 on the pi sleeve to p rat said through this latter form of the chuck. S eev Figure 9 is a view in section on a plane de- T0 efieet S Pu p I form grooves 25 p noted by the dotted line 9-9 of Fig. 8. erably 011 pp Sides of the y 10 and e 30 Fig. 10 is a side view of the key for operating tending lengthwise thereof, and in such grooves the chuck. I place key supporting slides 26 having holes 27 In the accompanying drawing the numerallO to receive the stud on the end of the key. A lip denotes the body of my improved chuck provid-, 28 is formed on the inner end of each slide which ed with any suitable means for attachment to a lip is engaged with an annular groove on the in- 35 spindle or other driving member, a tapered hole ner surface of the sleeve 22, and as shown in Fig. 11 being shown herein for such purpose. A re- 4 of th drawing. 665$ 12 extends inwardly from the inner end of It will now be seen that as the sleeve 22 is rothe chuck body and the hu 13 Of a carrier tated by means of the key 29, the stud 30 thereon teeds e t a ball bearing 15 other being located in the hole 27 and the slide being tsflliita ble algtlgfllctlqil gniilsnbel being located m oved by engagement of the lip 28 with the i if fi a ig g g g 'gg g g i f groove in the sleeve, the teeth of the key will be W1 held fully engaged with the teeth 24 on the sleeve. in which aw actuating springs 18 are located, B th f i ed 5 rm S eachs rm there being one of these springs appurtenant to e use 0 my mp p g P g 45 each jaw The springs are preferably of U shape acts independently upon its Jaw and there is no ther each having one outturned end 19 extending into depfandenc? of f F 0.116 upon t a hole in the bottom of a slot 17 and the oppoas Pmr devlcfis Whlch i type .9 Jaw site end projecting into the end of one of the jaws useFli a Improved p posltmn and 20 as Clearly Shown in Fig 4 f the drawing ma ntain the Jaws equal distances apart, the

These jaws are of 01d and welpknown c0nstmc springs being held by the grooves in the carrier tion in chucks of this type, being of somewhat triequally P efiect thls rfesultflthe of angular shape as shown in full and dotted lines the Sprmgs bemg m radlal dlrectlqn 9 Consequently the jaws are always maintained in Fig. 3, the back surfaces of the jaws being rounded as at 21 for a bearing against the tapered with their binding edges at the axial center of the 55 chuck with a result that the drill or reamer or other tool is always properly centered.

In that form of my improved chuck shown in Figs. 6 to 9 a hole 31 to receive the stud of the key is formed in the sleeve 22 and a toothed clamping ring 32 encircles the body 10 but is held from rotation by keys 33 slidably mounted in the grooves 25. There are preferably two of these keys and each has a lip 34 engaging the outer surface of the ring 32 and an inner lip 35 engaging within an annular groove 36 on the inner surface of the recess in the clamping sleeve 22, and as shown in Fig. 8 of the drawing.

In this form of the device the stud 30 of the key is inserted in the hole 31 and the teeth of the key are engaged with the teeth 3'7 on the under side of the ring 32, and as the sleeve moves along the body the engagement of the lips 34 and 35 with the sleeve and the ring holds said members against separating movement with a result that the teeth of the key are maintained in full engagement with the teeth 37 on the ring.

I claim:

1. A chuck including a body, a clamping sleeve threadedly engaged with said body and rotatable thereon, clamping jaws supported by the body and operatively engaged by said sleeve, a toothed ring encircling said body adjacent the end of said sleeve and having its teeth positioned for engagement by the teeth of a key rotatably engaged with said clamping sleeve, and means for attachment of the ring to the sleeve for relative rotation of said sleeve and ring.

2. A chuck including a body, a clamping sleeve threadedly engaged with said body and rotatable thereon, clamping jaws supported by the body and operatively engaged by said sleeve, a slide located in a groove in said body and maintained in engagement with said sleeve, and a toothed ring encircling said sleeve and engaged with said slide and having its teeth positioned for engagement by the teeth of a key rotatably attachable to said clamping sleeve.

3. A chuck including a body, a sleeve threadedly engaged with said body and rotatably mounted thereon, said sleeve having means for attachment of a key thereto, chuck jaws supported by said body and operatively engaged with said sleeve, a slide mounted on the body and having a notch engaged by a lip from said clamping sleeve, a clamping ring engaged in said notch and held against rotation on said body, and teeth on said ring engageable by the teeth of a key attached to said sleeve.

ARTHUR M. STONER. 

